User equipments, base stations and methods for beam indication of network-controlled repeater

Abstract

A network-controlled repeater (NCR) apparatus that communicates with a user equipment (UE) and a base station apparatus is described. The NCR apparatus may include receiving circuitry configured to receive a radio resource control (RRC) message comprising first information used for indicating a first list of Transmission Configuration Indicator (TCI) state(s) for beam(s) associated with backhaul-link and/or C-link, receive an RRC message comprising second information used for indicating a second list of Transmission Configuration Indicator (TCI) state(s) for beam(s) associated with access link, receive a first media access control (MAC) Control Element (CE) message comprising third information, and receive a second media access control (MAC) Control Element (CE) message comprising fourth information. The apparatus may also include transmitting circuitry configured to transmit a physical downlink control channel (PDCCH) carried by the access-link according to the second TCI state.

What is claimed is: 
     
         1 . A network-controlled repeater (NCR) apparatus that communicates with a user equipment (UE) and a base station apparatus, comprising: receiving circuitry configured to:
 receive a radio resource control (RRC) message comprising first information used for indicating a first list of Transmission Configuration Indicator (TCI) state(s) for beam(s) associated with backhaul-link and/or C-link;   receive an RRC message comprising second information used for indicating a second list of Transmission Configuration Indicator (TCI) state(s) for beam(s) associated with access link;   receive a first media access control (MAC) Control Element (CE) message comprising third information used for indicating a first TCI state for physical downlink control channel (PDCCH) carried by the backhaul-link and/or the C-link from the first list;   receive a second media access control (MAC) Control Element (CE) message comprising fourth information used for indicating a second TCI state for physical downlink control channel (PDCCH) carried by the access link from the second list; and   receive a physical downlink control channel (PDCCH) carried by the backhaul-link and/or the C-link according to the first TCI state;   transmitting circuitry configured to:   transmit a physical downlink control channel (PDCCH) carried by the access-link according to the second TCI state.   
     
     
         2 . A base station apparatus that communicates with a user equipment (UE) and a network-controlled repeater (NCR) apparatus, comprising: transmitting circuitry configured to:
 transmit a radio resource control (RRC) message comprising first information used for indicating a first list of Transmission Configuration Indicator (TCI) state(s) for beam(s) associated with backhaul-link and/or C-link;   transmit an RRC message comprising second information used for indicating a second list of Transmission Configuration Indicator (TCI) state(s) for beam(s) associated with access link;   transmit a first media access control (MAC) Control Element (CE) message comprising third information used for indicating a first TCI state for physical downlink control channel (PDCCH) carried by the backhaul-link and/or the C-link from the first list;   transmit a second media access control (MAC) Control Element (CE) message comprising fourth information used for indicating a second TCI state for physical downlink control channel (PDCCH) carried by the access link from the second list; and   transmit a physical downlink control channel (PDCCH) carried by the backhaul-link and/or the C-link according to the first TCI state.   
     
     
         3 . A user equipment (UE) that communicates with a network-controlled repeater (NCR) apparatus and a base station apparatus, comprising: receiving circuitry configured to:
 receive an RRC message comprising second information used for indicating a second list of Transmission Configuration Indicator (TCI) state(s) for beam(s) associated with access link;   receive a second media access control (MAC) Control Element (CE) message comprising fourth information used for indicating a second TCI state for physical downlink control channel (PDCCH) carried by the access link from the second list; and   receive a physical downlink control channel (PDCCH) carried by the access-link according to the second TCI state.